Software Engineering and Programming Languages
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Polychannel systems for mass digital communications
A new type of distributed computer system looks toward the time when computers will be used by everyone everywhere.
Phoenix: a safe in-memory file system
Phoenix contains two timestamped versions of the in-memory file system allowing for a reserve version that ensures safety for diskless computers with battery-powered memeory.
Generalized predictive TCQ of speech
Trellis coded quantization (TCQ) is incorporated into a noise feedback coding structure for encoding sampled speech. The effects of varying the encoding delay and the number of symbols released per trace-back on system performance and complexity are investigated.
An incremental constraint solver
An incremental constraint solver, the DeltaBlue algorithm maintains an evolving solution to the constraint hierarchy as constraints are added and removed. DeltaBlue minimizes the cost of finding a new solution after each change by exploiting its knowledge of the last solution.
DATAPLEX: an access to heterogeneous distributed databases
Diverse database management systems are used in large organizations. The heterogeneous distributed database system (DDS) can provide a flexible intergration of diverse databases for users and applications. This is because it allows for retrieval and update of distributed data under different data systems giving the illusion of accessing a single centralized database system.
Bounding delay on a multifarious token ring network
Interest in integrating voice and data on local computer networks has been building in recent years. Subsequently, much research has been devoted to various techniques that are implementable on existing networks using current standards. This exposition discusses the design issues in implementing a document retrieval system on a token ring network.
Design complexity measurement and testing
System designers can quantify the complexity of a software design by using a trio of finely tuned design metrics.
Entity-life modeling and structured analysis in real-time software design—a comparison
While structure analysis is sometimes used as a first step towards a real-time software design with concurrent tasks, a more appropriate task structure can often be based directly on concurrent patterns in the problem environment.
A technique for associating rewrite rules with productions so that many high-level transformations of a source file can be generated easily is described. While eclipsed in power by other editing and compiler generation systems supporting management of both synthesized and inherited attributes, this approach is especially simple to employ and is sufficient in power to deal with a wide class of problems arising from practical applications.
Episodic skeletal-plan refinement based on temporal data
ONCOCIN is a medical expert system that extends the skeletal-planning technique to an applciation area where the history of past events and the duration of actions are important. The system's knowledge base is designed to reflect a hierarchical model of the domain, and its control and inference mechanisms encourage a mixed-initiative style of interaction between the computer and the user.
Lessons learned from modeling the dynamics of software development
Software systems development has been plagued by cost overruns, late deliveries, poor reliability, and user dissatisfaction. This article presents a paradigm for the study of software project management that is grounded in the feedback systems principles of system dynamics.
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